What if

7 years. It's have been 7 long years since Chicago's intelligence Until lost their finest cop. She's was smart, talented, and loved. Erin Lindsay didn't have much of choice when leaving Chicago. This was her home, she had her first father figure, she had a stable group of friends, stable job, but most importantly, She had Jay Halstead, the love of her life. He tried to call her, and moved to New York. She got voight to pull some strings to work with the FBI. Little did she know , she was pregnant, and it could be only person's. What's happens when Erin must come back to Chicago and face her old life.